Jet IBGM-8VS, Operating Instructions And Parts Manual

16

10.0

  Troubleshooting IBGM-8VS Bench Grinder w/Multitool 

10.1

  General electrical and mechanical problems 

Table 4 

* 

WARNING:

  Some corrections may require a qualified electrician. 

Symptom Possible 

Cause 

Correction 

* 

Motor will not start. 

Not connected to power source. 

Verify that plug is properly inserted into 
receptacle. 

Motor cord cut or abraded. 

Replace with new cord. 

Wheels cannot rotate because of 
obstruction. 

Unplug and turn wheel by hand to ensure 
free movement. Restart. 

Plug on cord is faulty. 

Replace with new plug. 

Low line voltage. 

Check power line for proper voltage. 

Fuse blown or circuit breaker open. 

Re-set. May be too many machines on 
one line. 

Faulty switch.  

Replace switch. 

Open circuit in motor or loose 
connection. 

Inspect all lead connections on motor for 
loose or open connections. 

Motor faulty, or inverter PCB fault. 

Contact JET technical service. 

Motor will not start; 
fuses blow or circuit 
breakers trip. 

Too many electrical machines 
running on same circuit. 

Turn off other machines and try again. 

Incorrect fuse. 

Use time-delay fuse, or go to circuit with 
higher rated fuse or breaker. 

Wheels cannot rotate because of 
obstruction. 

Unplug and turn grinding wheel by hand to 
ensure free movement. Clear any 
obstructions and restart. 

Undersized extension cord. 

Use correct size extension cord. 

Short circuit in line cord or plug. 

Inspect cord or plug for damaged 
insulation and shorted wires. 

Short circuit in motor or loose 
connections. 

Inspect all connections on motor for loose 
or shorted terminals or worn insulation. 

Motor fails to develop 
full power. 

Low line voltage. 

Check power line for proper voltage. 

Faulty motor or capacitor. 

Contact JET technical service. 

Motor overheats. 

Motor overloaded. 

Reduce pressure against wheel. Make 
sure grit size is appropriate for the job. 

Motor stalls, resulting 
in blown fuses or 
tripped circuit. 

Motor overloaded. 

Reduce load on motor; do not press so 
hard. 

Capacitor failure. 

Contact JET technical service. 

Short circuit in motor or loose 
connections. 

Inspect connections on motor for loose or 
shorted terminals or worn insulation. 

Low voltage. 

Correct the low voltage conditions. 

Incorrect fuses or circuit breakers in 
power line. 

Install correct fuses or breakers.